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<a name="sort.single_thread.spreadsort.sort_hpp.rationale.unstable_sort"></a><a class="link" href="unstable_sort.html" title="Unstable Sorting">Unstable
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<p>
              Making a <a href="http://en.wikipedia.org/wiki/Radix_sort" target="_top">radix
              sort</a> stable requires the usage of an external copy of the data.
              A stable hybrid algorithm also requires a stable comparison-based algorithm,
              and these are generally slow. LSD <a href="http://en.wikipedia.org/wiki/Radix_sort" target="_top">radix
              sort</a> uses an external copy of the data, and provides stability,
              along with likely being faster (than a stable hybrid sort), so that's
              probably a better way to go for integer and floating-point types. It
              might make sense to make a stable version of <code class="literal"><code class="computeroutput"><a class="link" href="../../../../../boost/sort/spreadsort/string_sort_idm2523.html" title="Function template string_sort">string_sort</a></code></code>
              using external memory, but for simplicity this has been left out for
              now.
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